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公开(公告)号：US5412221A
公开(公告)日：1995-05-02
申请号：US233584
申请日：1994-04-26
IPC分类号： G01N15/06
CPC分类号： G01N15/06
摘要： A particle fallout/activity sensor measures relative amounts of dust or other particles which collect on a mirror in an area to be monitored. The sensor includes a sensor module and a data acquisition module, both of which can be operated independently of one another or in combination with one another. The sensor module includes a housing containing the mirror, an LED assembly for illuminating the mirror and an optical detector assembly for detecting light scattered off of the mirror by dust or other particles collected thereon. A microprocessor controls operation of the sensor module's components and displays results of a measurement on an LCD display mounted on the housing. A push button switch is also mounted on the housing which permits manual initiation of a measurement. The housing is constructed of light absorbing material, such as black delrin, which minimizes detection of light by the optical detector assembly other than that scattered by dust or particles on the mirror. The data acquisition module can be connected to the sensor module and includes its own microprocessor, a timekeeper and other digital circuitry for causing the sensor module to make a measurement periodically and send the measurement data to the data acquisition module for display and storage in memory for later retrieval and transfer to a separate computer. The time tagged measurement data can also be used to determine the relative level of activity in the monitored area since this level is directly related to the amount of dust or particle fallout in the area.
摘要翻译： 颗粒沉降/活性传感器测量在被监测区域中的镜子上收集的灰尘或其他颗粒的相对量。 该传感器包括一个传感器模块和一个数据采集模块，它们都可以彼此独立运行或彼此组合操作。 传感器模块包括容纳反射镜的壳体，用于照射反射镜的LED组件和用于检测由其上收集的灰尘或其它颗粒散射离开反射镜的光的光学检测器组件。 微处理器控制传感器模块组件的操作，并在安装在外壳上的LCD显示屏上显示测量结果。 按钮开关也安装在壳体上，允许手动启动测量。 外壳由诸如黑色delrin的光吸收材料构成，其最小化除了由镜子上的灰尘或颗粒散射的光检测器组件的光的检测。 数据采集模块可以连接到传感器模块，并且包括其自己的微处理器，计时器和其他数字电路，用于使传感器模块周期性地进行测量，并将测量数据发送到数据采集模块，以便在存储器中显示和存储 稍后检索并转移到单独的计算机。 时间标记的测量数据也可用于确定监测区域中的相对活动水平，因为该水平与该区域的灰尘或颗粒物的沉降量直接相关。
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2.发明授权Portable light source unit for simulating fires having an adjustable aperture 失效便携式光源单元，用于模拟具有可调光圈的火焰
公开(公告)号：US5627362A
公开(公告)日：1997-05-06
申请号：US431801
申请日：1995-05-01
CPC分类号： F21L15/02 , F21V11/14 , F21V23/00 , G08B29/145
摘要： A portable, hand held light source unit is employed to check operation of fire detectors, such as hydrogen fire detectors. The unit emits radiation in a narrow band of wavelengths which are generated by the type of fire to be tested, but not by other light sources such as the sun or incandescent lamps. The unit can test fire detectors at different distances, and of different sensitivities. The intensity of the radiation emitted by the unit is adjustable for this purpose by means of a rotatable disk having a plurality of different sized apertures for selective placement between the light source and an output lens. The disk can also be rotated to a calibration position which causes a microprocessor circuit in the unit to initiate a calibration procedure. During this procedure, the lamp intensity is measured by a photodetector contained within the unit, and the microprocessor adjusts the lamp current to insure that its intensity remains within a preset range of values. A green and a red LED are mounted on the unit which indicate to an operator whether the calibration is successful, as well as the condition of the unit's battery power supply.
摘要翻译： 使用便携式手持式光源单元来检查火灾探测器的操作，例如氢火灾探测器。 该单元发射由被测试的火焰类型产生的窄波长波段的辐射，而不是由诸如太阳或白炽灯的其它光源产生的辐射。 该单元可以测试不同距离和不同灵敏度的火灾探测器。 通过具有多个不同大小的孔径的可旋转盘，用于在光源和输出透镜之间的选择性放置，由该单元发射的辐射的强度是可调节的。 盘也可以旋转到校准位置，这导致该单元中的微处理器电路启动校准过程。 在此过程中，灯强度由包含在该单元内的光电检测器测量，并且微处理器调节灯电流以确保其强度保持在预设值范围内。 设备上安装了一个绿色和红色的LED灯，指示操作员校准是否成功，以及本机电池电源的状况。
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公开(公告)号：US5561290A
公开(公告)日：1996-10-01
申请号：US488523
申请日：1995-06-09
CPC分类号： G08B17/12 , G01J1/02 , G01J1/08 , G01J1/0403 , G01J1/0418 , G01J1/0437 , G01J1/0444 , G01J1/0448
摘要： An optical detector calibrator system simulates a source of optical radiation to which a detector to be calibrated is responsive. A light source selected to emit radiation in a range of wavelengths corresponding to the spectral signature of the source is disposed within a housing containing a microprocessor for controlling the light source and other system elements. An adjustable iris and a multiple aperture filter wheel are provided for controlling the intensity of radiation emitted from the housing by the light source to adjust the simulated distance between the light source and the detector to be calibrated. The geared iris has an aperture whose size is adjustable by means of a first stepper motor controlled by the microprocessor. The multiple aperture filter wheel contains neutral density filters of different attenuation levels which are selectively positioned in the path of the emitted radiation by a second stepper motor that is also controlled by the microprocessor. An operator can select a number of detector tests including range, maximum and minimum sensitivity, and basic functionality. During the range test, the geared iris and filter wheel are repeatedly adjusted by the microprocessor as necessary to simulate an incrementally increasing simulated source distance. A light source calibration subsystem is incorporated in the system which insures that the intensity of the light source is maintained at a constant level over time.
摘要翻译： 光学检测器校准器系统模拟待校准的检测器响应的光辐射源。 选择用于发射对应于源的光谱特征的波长范围内的辐射的光源被设置在包含用于控制光源和其它系统元件的微处理器的壳体内。 提供可调节虹膜和多孔滤光轮，用于控制由光源从壳体发射的辐射的强度，以调节光源和要校准的检测器之间的模拟距离。 齿轮传动的虹膜具有通过由微处理器控制的第一步进电机可调节的孔径。 多孔滤光轮包含不同衰减水平的中性密度滤光片，它们被微处理器控制的第二步进电机选择性地定位在发射辐射的路径中。 操作员可以选择多种检测器测试，包括范围，最大和最小灵敏度以及基本功能。 在范围测试期间，必要时由微处理器重复调整齿轮传动的虹膜和滤光轮以模拟逐渐增加的模拟源距离。 在系统中并入光源校准子系统，其确保光源的强度随时间保持在恒定水平。
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